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Python Essentials II�Module 3 - 3.4.1.1 ~ 3.4.1.12

Cisco Networking Academy Introduction

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Licensing & Attribution

Open Source Philosophy - I have come to realize that I’m really not competing with other teachers. Maybe I have some local competition, but in reality, if a student is not coming to my class or my school, then I’m not competing with other teachers in any way… If you work more than a District away, then we really are not competitors. Let's Share... Collaborate... Help each other... I, and you, may have sweat blood and tears developing a lesson plan, a lab, or presentation… There is an ENORMOUS unpaid value there… I get that… I don’t begrudge teachers who are trying to sell their collateral… I’m just saying that is not what I’m going to do. But that is my plan. I’m going to share virtually everything I develop. Join Me!!! See More

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GNU Public License & EUPL (European Union Public Licence)

Any included or linked Programming Code Is licensed under GNU General Public License v3.0 & and / or licensed under EUPL 1.2 or later

See the Appendix for Additional Licensing & Attribution Information

Please maintain this slide with any

modifications you make

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Resources & Materials Needed

PC, Laptop or Other device to access sites & applications specified by your Instructor
Access to the Cisco Networking Academy �Python Esentials class

https://lms.netacad.com/course/

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👉 Try This:

Browser: You can use a web based Browser IDE like Replit.com, PythonTutor or Trinket.
Installed Python IDLE: If you installed Python open an IDLE window

print("Hisssssssssss")

Try This 👉

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Sections Covered In This Lesson

3.4.1.1 - Why do we need lists?

3.4.1.2 - Indexing lists

3.4.1.3 - Accessing list content

3.4.1.4 - Removing elements from a list

3.4.1.5 - Negative indices are legal

3.4.1.6 - Lab

3.4.1.7 - Functions vs. methods

3.4.1.8/9 - Adding elements to a list

3.4.1.10 - Making use of lists

3.4.1.11 - Lists in action

3.4.1.12 - Lab

Try This 👉

Work all the code examples in the sections

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Key Concepts & Topics...

Multi-value variables, e.g. numbers [10,5,7,2,1]

list may have different types
convention: list always numbered starting from zero
the above example is a list of scalars

Selecting an element from a list is called indexing
Assigning a new value 111 to first element: numbers[0]=111
Accessing list. Entire list, e.g. print (numbers) or particular element , e.g. print(numbers[0]) =111; print(numbers)= [111,5,7,2,1]
Length of a list is the len() function,.e.g. len(numbers) is 5
Removing from list, e.g. del numbers[1] removes element1
You can not access an element which does not exist
Negative indices are legal. numbers[-1] is the last element, e.g. 1; numbers[-2] is the 2nd last one, e.g. 2; numbers[-3], is 7 etc.

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Key Concepts & Topics...

A function doesn't belong to any data - it gets data, it may create new data and it (generally) produces a result.

functions take an argument, does something, and returns a result
typical function: result = function(arg)

A method is a specific kind of function - it behaves like a function and looks like a function, but differs in the way in which it acts, and in its invocation style.

A method is like a function but is also able to change the state of a selected entity
typical method: result= data.method(arg)

A method is owned by the data it works for, while a function is owned by the whole code.

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Key Concepts & Topics...

Adding elements to a list

new element glued to end of list: list=append(value)
this is a method named append(). Takes argument's value and puts it at the end of the list which owns the method.
The list's length then increases by one.
insert() method adds new element at any place in the list

It takes two arguments. Position and the actual element
e.g. numbers.insert(0, 222) inserts 222 in position 0

List can start empty. This is done with an empty pair of square brackets
the for instruction specifies the variable used to browse the list

e.g. for i in my_list

Python offers a more convenient way of doing the swap without using a third variable

e.g. variable_1, variable_2 = variable_2, variable_1

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Your Take-Away From These Sections

List is a type of data used to store multiple objects

ordered and mutable collection
separated by comma between square brackets

Lists can be indexed and updated
Lists can be nested
List elements and lists can be deleted
Lists can be iterated using for loop
len() function to check list’s length
function invocation: result = function(arg)
method invocation: result = data.method(arg)

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Can You Answer These Questions?

What is the output?�lst = [1,2,3,4,5]�lst.insert (1,6)�del lst[0]�lst.append(1)�print(lst)�

What is the output?�lst = []�del lst�print(lst)

What is the output?�lst = [1, [2,3],4]�print(lst[1])�print(len(lst))

"Mastery" means you can describe why these topics and concepts are important. Can you explain and discuss these ideas? As you read and work the code examples pay special attention to these ideas.

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Thank You…

Questions?

If you are in one of my classes, you can probably send / post questions in:

STEAM Clown’s Homepage (look at "Units")
Link from my Mechatronics Engineering Google Sites Page

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Reference Slides

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Education Standards

California's 2013 CTE Standards
Next Generation Science Standards
California Math Common Core Standards
California English Common Core Standards
California History-Social Science Standards
California English Language Development Standards
Next Generation Science Standards (1)
California's 2013 CTE Standards (2)
Related Instructional Objectives (SWBAT...)

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Quiz Answers

What is the output?�lst = [1,2,3,4,5]�lst.insert (1,6)�del lst[0]�lst.append(1)�print(lst)��answer: [6,2,3,4,5,1]�
lst = []�del lst�print (lst)��answer: NameError: name ‘lst’ is not defined�
lst = [1, [2,3],4]�print(lst[1])�print(len(lst))��answer: [2,3]� 3

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Appendix

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Appendix : Primary Sources & Attribution for Material Used

Please maintain this slide with any modifications you make

<Add Your Logo and Attribution here>

Much of this interpretation is primarily the Intellectual Property of Jim Burnham, Top STEAM Clown, at STEAMClown.org
My best attempt to properly attribute, or reference any other sources or work I have used are listed below. This presentation and content is distributed under the Creative Commons License and the The programming code found in this presentation or linked to on my Github site is distributed under the GPL and EUPL:

Creative Commons License CC-BY-NC-SA 4.0
GNU General Public License v3.0
European Union Public Licence EUPL 1.2 or later

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Image Reference & Sources

https://starwars.fandom.com/wiki/Yoda

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What To Fix, Add, Or Change

Presentation Planning:

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